DENTAL
DENTAL ASSISTANT ACTUAL EXAM
2025 QUESTIONS AND CORRECT
DETAILED ANSWERS
A permanent Dentition consists of how many teeth - Correct Answer-32
Which teeth are sometimes called the "eye" teeth - Correct Answer-Canines
Which proximal surface of a tooth is closest toward the midline of the body` - Correct
Answer-Mesial
A permanent dentition consists of how many premolars - Correct Answer-8
When a mouth is divided into fourths, the parts are referred to as - Correct Answer-
Quadrant
Using the Universal System of tooth designation, what tooth is # 12 - Correct Answer-
Maxillary left first premolar
Using the International standards Organization system of tooth recording, which tooth is
# 25 - Correct Answer-Maxillary left second premolar
What is the structure that connects cementum to the alveolar bone - Correct Answer-
Periodontal ligament
A gold crown is marked by: - Correct Answer-Diagonal lines through the crown
A dental assistant is preparing to chart a new patient's treatment plan for the doctor.
Treatment provided in a previous dental office should be charted in what color - Correct
Answer-Black
Two red vertical lines drawn between the upper central incisors on a patient chart would
indicate: - Correct Answer-Diastema
The recommended technique for determining a patient's pulse or respiration rate is to : -
Correct Answer-Measure for 30 seconds, then multiply by 2
In Order to determine how much to inflate a blood pressure cuff for an accurate reading,
a dental assistant measures the patient's BPM Brachial rate and adds to determine the
inflation level in mm Hg. - Correct Answer-40
DENTAL
,DENTAL
An average adult respiration rate is Breaths per minute - Correct Answer-10-20
What is the normal pulse rate in a resting adult - Correct Answer-60-100 bpm
Standard practice provides, and some state laws require, that a signed privacy policy be
kept in a patient's file for a minimum of - Correct Answer-some state law set the
minimum at 5 years
Which of the following is not a parts of a dental examination - Correct Answer-Health
history review
What classification of decay is located on the gingival third on the facial or lingual
surfaces of teeth - Correct Answer-Class V- smooth surface decay
While examining a patient, a dentist says he sees Class IV decay. Which of the
following teeth would he be looking at - Correct Answer-Incisors and canines are the
only teeth to be diagnosed with class IV Decay
The area also known as the neck of the tooth is more appropriately called the : - Correct
Answer-CEJ Cementoenamel junction is the junction of tooth enamel with cementumat
the neck or cervix of the tooth
What type of tissue covers alveolar bone, attaching to the teeth at the margin of the
gumlines - Correct Answer-Epithelial attachment
What is The tissue that divides the nasal cavity into 2 Part - Correct Answer-Septum
Which nerve is the primary nerve for the mouth - Correct Answer-Trigeminal - It has
both maxillary and mandibular innervation
The pituitary gland is part of what body system - Correct Answer-Endocrine is the
system which regulates gland that produce hormones, including the pituitary
What position places the chair back until the patient is almost lying down - Correct
Answer-Supine where the head ,chest and knees are approximately on the same level
What is the best method of identifying working positions by a dental auxiliary - Correct
Answer-Clock concept dividing the treatment area into zones
When transferrings an instrument to the dentist, the dental assistant should: - Correct
Answer-Transfer the instrument with the working end in the position of use
When retrieving an instrument from a right-handed operator, the assistant uses the
fingers of their left hand - Correct Answer-Last 2
DENTAL
, DENTAL
Most of the time, a dental assistant will be working in what " time zone" during a
treatment procedure - Correct Answer-2-4 "time zone" during procedures for left handed
operators the dental assistant would work in the 8-10 "time zone"
Which chair has a foot bar for support - Correct Answer-Assistant's stool
The High Volume Evacuator tips should be placed to the tooth being prepared - Correct
Answer-Parallel to properly place and operate. the HVE , the bevel of the suction tip
should be positioned so that it parallel to the tooth surface prepared. ( slightly beyond
the occlusal surface or incisal edge
What isolation method is appropriate for one or several teeth - Correct Answer-Dental
dam
An adult male arrives for a scheduled root canal and crown appointment. The dental
assistant prepares the instrument fray and equipment when he is seated . What size
hole punch is needed for a premolar on a dental dam - Correct Answer-NO. 3 Punches
are appropriate for premolars when preparing a dental Dam
When removing a dry cotton roll from the mouth - Correct Answer-Moisten with water
before removal
Which of the following is not a contraindication for the use of N2O2 - Correct Answer-
Anemia is not a contraindication for the use of N2O2
What part of the gas machine houses the nitrous oxide and oxygen to combine them
together for the patient to breathe - Correct Answer-Reservoir Bag Is the Chamber that
houses the gases
Nitrous Oxide has been used on a patient. For how many minutes afterward should the
patient remain on 100% Oxygen - Correct Answer-3 to 5 minutes is the appropriate
length of time for patients
Which of the following is an approved method by the Center for Disease Control for re-
capping a used needle - Correct Answer-Using a recapping device, Single- handed
swoop
A long needle, 1 1/8" in length, is used for what type of injections - Correct Answer-
Block Typically, 1 5/8" long needle is used for block anesthesia
What type of injection involves the tissues near the apex of a tooth - Correct Answer-
Infiltration is the technique that is used when in ecting anesthetic around a tooth to
affect the tissues around and near the apex of the tooth
DENTAL
DENTAL ASSISTANT ACTUAL EXAM
2025 QUESTIONS AND CORRECT
DETAILED ANSWERS
A permanent Dentition consists of how many teeth - Correct Answer-32
Which teeth are sometimes called the "eye" teeth - Correct Answer-Canines
Which proximal surface of a tooth is closest toward the midline of the body` - Correct
Answer-Mesial
A permanent dentition consists of how many premolars - Correct Answer-8
When a mouth is divided into fourths, the parts are referred to as - Correct Answer-
Quadrant
Using the Universal System of tooth designation, what tooth is # 12 - Correct Answer-
Maxillary left first premolar
Using the International standards Organization system of tooth recording, which tooth is
# 25 - Correct Answer-Maxillary left second premolar
What is the structure that connects cementum to the alveolar bone - Correct Answer-
Periodontal ligament
A gold crown is marked by: - Correct Answer-Diagonal lines through the crown
A dental assistant is preparing to chart a new patient's treatment plan for the doctor.
Treatment provided in a previous dental office should be charted in what color - Correct
Answer-Black
Two red vertical lines drawn between the upper central incisors on a patient chart would
indicate: - Correct Answer-Diastema
The recommended technique for determining a patient's pulse or respiration rate is to : -
Correct Answer-Measure for 30 seconds, then multiply by 2
In Order to determine how much to inflate a blood pressure cuff for an accurate reading,
a dental assistant measures the patient's BPM Brachial rate and adds to determine the
inflation level in mm Hg. - Correct Answer-40
DENTAL
,DENTAL
An average adult respiration rate is Breaths per minute - Correct Answer-10-20
What is the normal pulse rate in a resting adult - Correct Answer-60-100 bpm
Standard practice provides, and some state laws require, that a signed privacy policy be
kept in a patient's file for a minimum of - Correct Answer-some state law set the
minimum at 5 years
Which of the following is not a parts of a dental examination - Correct Answer-Health
history review
What classification of decay is located on the gingival third on the facial or lingual
surfaces of teeth - Correct Answer-Class V- smooth surface decay
While examining a patient, a dentist says he sees Class IV decay. Which of the
following teeth would he be looking at - Correct Answer-Incisors and canines are the
only teeth to be diagnosed with class IV Decay
The area also known as the neck of the tooth is more appropriately called the : - Correct
Answer-CEJ Cementoenamel junction is the junction of tooth enamel with cementumat
the neck or cervix of the tooth
What type of tissue covers alveolar bone, attaching to the teeth at the margin of the
gumlines - Correct Answer-Epithelial attachment
What is The tissue that divides the nasal cavity into 2 Part - Correct Answer-Septum
Which nerve is the primary nerve for the mouth - Correct Answer-Trigeminal - It has
both maxillary and mandibular innervation
The pituitary gland is part of what body system - Correct Answer-Endocrine is the
system which regulates gland that produce hormones, including the pituitary
What position places the chair back until the patient is almost lying down - Correct
Answer-Supine where the head ,chest and knees are approximately on the same level
What is the best method of identifying working positions by a dental auxiliary - Correct
Answer-Clock concept dividing the treatment area into zones
When transferrings an instrument to the dentist, the dental assistant should: - Correct
Answer-Transfer the instrument with the working end in the position of use
When retrieving an instrument from a right-handed operator, the assistant uses the
fingers of their left hand - Correct Answer-Last 2
DENTAL
, DENTAL
Most of the time, a dental assistant will be working in what " time zone" during a
treatment procedure - Correct Answer-2-4 "time zone" during procedures for left handed
operators the dental assistant would work in the 8-10 "time zone"
Which chair has a foot bar for support - Correct Answer-Assistant's stool
The High Volume Evacuator tips should be placed to the tooth being prepared - Correct
Answer-Parallel to properly place and operate. the HVE , the bevel of the suction tip
should be positioned so that it parallel to the tooth surface prepared. ( slightly beyond
the occlusal surface or incisal edge
What isolation method is appropriate for one or several teeth - Correct Answer-Dental
dam
An adult male arrives for a scheduled root canal and crown appointment. The dental
assistant prepares the instrument fray and equipment when he is seated . What size
hole punch is needed for a premolar on a dental dam - Correct Answer-NO. 3 Punches
are appropriate for premolars when preparing a dental Dam
When removing a dry cotton roll from the mouth - Correct Answer-Moisten with water
before removal
Which of the following is not a contraindication for the use of N2O2 - Correct Answer-
Anemia is not a contraindication for the use of N2O2
What part of the gas machine houses the nitrous oxide and oxygen to combine them
together for the patient to breathe - Correct Answer-Reservoir Bag Is the Chamber that
houses the gases
Nitrous Oxide has been used on a patient. For how many minutes afterward should the
patient remain on 100% Oxygen - Correct Answer-3 to 5 minutes is the appropriate
length of time for patients
Which of the following is an approved method by the Center for Disease Control for re-
capping a used needle - Correct Answer-Using a recapping device, Single- handed
swoop
A long needle, 1 1/8" in length, is used for what type of injections - Correct Answer-
Block Typically, 1 5/8" long needle is used for block anesthesia
What type of injection involves the tissues near the apex of a tooth - Correct Answer-
Infiltration is the technique that is used when in ecting anesthetic around a tooth to
affect the tissues around and near the apex of the tooth
DENTAL
